Abstract: A head-mounted device (HMID) may include a front portion, a rear portion and one or more bands. The front portion may include an optical display configured to output image light to a user's eyes. The rear portion may be arranged with the front portion to balance the HMID in weight. The one or more bands connect the front portion and the rear portion so that the two portions rest on either side of the user's head.

Abstract: An apparatus for evaluating the condition of a lift sling. The apparatus includes a body with an upper section and a lower section. The lower section includes a cradle member with a load bearing surface that engages an inner surface of a connecting link at one end of a sling. The apparatus includes an engagement section that receives and positions the end of a measuring device so that it is in tangential alignment with the load bearing surface of the cradle member. In use, one end of a sling is positioned on the load bearing surface of the cradle member and one end of a measuring device is positioned on the engagement section of the apparatus. The apparatus is then raised so that the sling and the measuring device are hanging freely. The reach of the sling is then measuring using the measuring device.

Abstract: A crane hook assembly and methods of use for safely lifting large conduits, such as wind generator tower sections. The hook assembly includes a steel frame member and a support member forwardly extending from the front surface of the frame member. The support member cooperates with the frame member to engage and retain an annular flange of the tower section. The hook assembly is secured onto the tower section with a securing mechanism, preferably using a rack and pinion gear assembly to actuate a locking pin. The sliding, retractable, locking pin may be actuated such that it is movable between an unlocked position and a locking position, such that the locking pin is positioned horizontally over the tower section when in the locked position and the locking pin is fully retracted from the front surface when the locking pin is in the unlocked position.

Abstract: An apparatus for evaluating the condition of a lift sling. The apparatus includes a body with an upper section and a lower section. The lower section includes a cradle member with a load bearing surface that engages an inner surface of a connecting link at one end of a sling. The apparatus includes an engagement section that receives and positions the end of a measuring device so that it is in tangential alignment with the load bearing surface of the cradle member. In use, one end of a sling is positioned on the load bearing surface of the cradle member and one end of a measuring device is positioned on the engagement section of the apparatus. The apparatus is then raised so that the sling and the measuring device are hanging freely. The reach of the sling is then measuring using the measuring device.

Abstract: A crane hook assembly and methods of use for safely lifting large conduits, such as wind generator tower sections. The hook assembly includes a steel frame member and a support member forwardly extending from the front surface of the frame member. The support member cooperates with the frame member to engage and retain an annular flange of the tower section. The hook assembly is secured onto the tower section with a securing mechanism, preferably using a rack and pinion gear assembly to actuate a locking pin. The sliding, retractable, locking pin may be actuated such that it is movable between an unlocked position and a locking position, such that the locking pin is positioned horizontally over the tower section when in the locked position and the locking pin is fully retracted from the front surface when the locking pin is in the unlocked position.